Stray Gas Migration and Applications in the use of Isotope Geochemistry
Stray Gas Migration and Applications in the use
of Isotope Geochemistry
Fred J. Baldassare, P.G. Geologist
Pennsylvania Department of Environmental Protection
1
Methane Is the Principal Hydrocarbon Detected in All of Our
Stray Gas Investigations
? Methane (CH4) is the simplest paraffin hydrocarbon gas.
? Flammable, colorless, odorless. ? Specific gravity: .555 ? Explosive range: 5-15% ? Solubility in water: 26-32 mg/l
2
Potential Stray Gas Sources Are Numerous in Western PA.
? Abandoned & operating gas wells ? Natural gas storage fields ? Natural gas pipelines ? Abandoned & operating coal mines
? Abandoned & operating landfills ? Shallow formations ? microbial/thermogenic ? Drift gas
3
Stray Gas...Legacy
4
The Consequences of the Undetected Migration of Stray Gas in the
Subsurface Can Be Devastating.
5
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